my mini project abstract: Title: RFID-BASED ADVANCED SECURITY SYSTEM FOR ACCESS-CONTROL Abstract: This Radio-Frequency Identification (RFID) based access-control system allows only authorised persons to enter a particular area of an establishment. The authorised persons are provided with unique tags, using which they can access that area. The system is based on micro controller AT89C52 and comprises an RFID module, an LCD module for displaying the status and a relay for opening the door. RFID is one of the latest technologies to be used in security systems. Unlike EM (Electro-Mechanical) and RF (Radio Frequency) systems, which have been used in access control systems for decades, RFID-based systems move beyond basic identification to an innovative and safe security system with an almost 100 percent detection rate using RFID tags. RFID tags are widely used in identification badges, replacing earlier magnetic stripe cards. These badges need only be held within a certain distance of the reader to authenticate the holder. Tags can also be placed on vehicles, which can be read at a distance, to allow entrance to controlled areas without having to stop and present a card or punch in an access code. In this project the RFID transceiver communicates with a passive tag when a person holding a valid tag comes in its proximity. It senses the identity of the person and if the tag is matched, then the device activates particular task like access control to a secured area, identification or attendance of the employee etc. When an authorised person having the tag enters the RF field generated by the RFID reader, RF signal is generated by the RFID reader to transmit energy to the tag and retrieve data from the tag. Then the RFID reader communicates through RXD and TXD pins of the microcontroller for further processing. The Microcontroller 89C52 is programmed to operate if an activation command is received from the RFID Module. Accordingly, the micro controller triggers a relay circuit and LCD display. The LCD displays the information on RFID tag of the entrant if it is valid or shows that “Access Denied” if the person is unauthorised or the tag is invalid. If the entry is valid, then the micro controller activates the relay. If the person is unauthorised, the LCD shows “access denied” and the door doesn’t open. Hardware used: RFID Module, Atmel AT89C52 Micro Controller, LCD Display, Voltage Regulators, Diodes & Transistors, Passive components. Software used: The software for this project is written in ‘C’ language and compiled using Keil μVision4 compiler. The finally obtained ‘.hex’ code is burnt into the microcontroller using a universal programmer. Simulation is being done by Proteus Professional.
Posted on: Tue, 11 Jun 2013 10:17:06 +0000
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